Process of manufacturing water bags or bottles.



I. F. KEPLER.

PROC ESS,0F MANUFACTURING WATER BAGS GR 891743158. APPLICATION FILED JAN. 17. I912.

1,164,196. 5 Patented Dec.14,1915 I. 3 SEEETS-SHEET I.

. E5555 6 V 1 [NViiNTORi W ism. m

I. F. KEPLER.

PROCESS OF MANUFACTURING WATER BAGS OIR BOTTLES.

APPLICATION FIL'ED .IAN.17. 1912.

1 ,164,1 96. Patented Dec 14:, 1915.

3 SHEETS-SHEET 2 WSSES {NVENTOR d t f Y I a I. F. KEPLER. PROCESS OF MANUFACTURING WATER BAGS 0R BOTTLES.

APPLICATION FILED JAN. 17. I912.

Patented Dec 14, 1915.

3 SHEETS-#SHEET 3.

[NIZENTORZ A ltorneyN l UNITED STA PATENT OFFICE.

LttWIN F. KEPLER, OF AKRON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE B. F. GOODRIOH COMPANY, A CORPORATION OF NEW YORK.

PROCESS OF MANUFACTURING WATER BAGS R BOTTLES.

To all whom it may concern:

Be it known that I, IRWIN F. KEPLER, a citizen of the United States, residing at Akron,'in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Processes of Manufacturing lVater Bags or Bottles, of which the following is a specification.

My present invention pertains to an improved process for the manufacture of was ter-bags or bottles and other hollow rubber articles, as will be hereinafter set forth.

'Broadly stated, the object of the invention is to produce what may be termed a onepiece article, inasmuch as the seam produced by my invention is of such strength as to amount to an integral weld. In the case of a hot-water bag, bottle or similar article, a feature of the invention consists in molding the plug or valve-socketin place at the same time as the last formative step is being taken in the production of the bag.

The bag or other hollow article produced by my process is formed without the use of seam-covering strips, separate throat pieces or the like, which, as is. well known, are the weak points in such structures, frequently half-bag sections produced in the molds dis-.'

closed in Figs. 1 to 3-, the bag-section being viewed from the underside, or that side 'which liesagainst the female mold,th'e protruding fin formed by the molds having been cut off of the upper half of the bag-section; Fig. 5 a fragmentary perspective view of a I portion of the,bag-section, disclosing the manner in which the fin is cut or separated therefrom; Figs. 6, 7 and 8, sectional views, taken on the lines 66, 7 -7 and 8-8, respectively, of said figures, showing the molds for producing the other partially cured halfbag or section; 9 a View similartorFig. 4, illustrating the bag-section produced bythe molds shown in Figs. 6, 7 and 8; Fig. 10 a longitudinal sectional view of the two Specification of Letters Patent.

Patented Dec. 14, 1915.

Application filed January 17, 1912. Serial No. 671,673.

female molds and the bag-sections carried thereby in their superposed position, the nipple or socket-carrier, which also cotiperates with the female molds to produce and form the funnel, being shown in place; Fig. 11. a transverse sectional view, on a somewhat enlarged scale, of the two female dies taken on the line 11-11 of Fig. 10, with one half of'the lower or tab end of the'bag shownin full; Fig. 12 a perspective view of the combined thimble or socket-carrier and funnel mold and Fig. 13 a perspective view of the completed bag, a portion of the edge being broken away to illustrate the manner in which the edge is reinforced or strengthened.

Stated in somewhat general terms, in the embodiment of my invention herein illustrated as applied to the production of water bottles the process may be said to consist in first forming a half bag with a fin projecting outwardly from the margin thereof, said fin being forced outwardlyfrom between the mold sections as the molds are pressed together to give the stock its initial form, and partial curing. The fin is then removed, the bag section at such time remaining within the female mold to which it adheres to a greater or less extent. The pro-' duction of the fin or the forcing of the material outwardly in the process of shaping the part insures a solid and homogeneous ultimate edge when the fin. isremoved by cuttingit across to form one of the joint surfaces. This is an important point in producing Water-bags, or other flat hollow articles, by means of my invention, since the flatness of the walls limits the amount of compression which can be transmitted to the joint-surfaces when the two halves are finally united. The invention is not. however, wholly confined to the formation of the joint or seam surfaces by cutting through a thickened fin. A. second half-bag 1S sin'iultaneously' or successively produced between another pair .of molds the contour being the same or slightly different in part, according to the contourof the bag-funnel. Said second half'has its fin removed and the two halves,

' still in the female molds, are (superposed,

the margins contacting throughout, except at the tab end ofthe funnel, a socket being screwed upon the funnel mold and positioned within or between thev neck portions of the bag-sections.

Referring first to Figs. 1 to 5 inclusive, 1

denotes the female mold. having such conformation as to produce, in conjunction with the male mold 2, a half-bag of the form shown in Fig. 4, that is, a body 3, a thickened, upwardly-curved edge 4, from which there extends outwardly a fin 5 (shown as removed in the upper portion of Fig. i), a tab section 6, having an opening 7, a throatpiece 8, and a funnel-section 9, having a handle or tab extension 10.

A sheet of raw rubber is first placed with in the female mold, being of such size as to overlie the depressions therein, and then the male mold is superposed and forced down, the parts being so formed as to leave a space around those sections which produce the curved edge 1 into which the surplus rubber may be forced, producing the fin 5, see Fig.

While embraced within the molds, the bag-section is partially cured, after which the male mold is withdrawn, leaving the bag-section adhering to the female mold. The fin 5 is then cut off along the line X--X, Fig. 2, leaving a flat and relatively broad face 11, Fig. 5.

The other half of the bag shown in Fig. 9, with the fin removed from the upper portion, is then produced by the molds shown in Figs. 6, 7 and 8, the female mold being designated by 12 and the male mold by 13. These molds are similar in form to the molds 1 and 2, except for the factthat no provision is made for the production of the funnel extension or tab 10. The same procedure is carried out as in the ease of the other bag-section, the fin being out 01f, producing a flat face or edge, as on the other bag-section. A threaded thimble or socketpiece 14., Fig. 10, is then screwed upon the threaded end 15, Fig. 12, of the combined socket-carrier and funnel mold, designated by 16. Said member, as will be seen upon reference to Fig. 12, is provided with de-' pressed portions. to receive the funnel and funne1-tab l0. Said member is positioned with reference to one of the female molds,

the threaded socket bearin upon the throatsection 8, and the other .emale mold, with its half-bag, is superposed, the flat edges 11 by preference being treated with cement prior to bringing the parts together to render them more sticky and adhesive. The mold sections 1 and 12, with the mold member 10, will then be forced and locked together and the bag or bottle vulcanized. During the vulcanizing operation water will, from time to time, be injected into the bag to produce the requisi e pressure to insure proper vulcanization {and to keep the flat sides of the bag from coming together. \V hen sufliciently cured, the molds 1 and 12 are withdrawn, and the mold member 16 rotated so as to withdraw, the threaded end 15 from the socket or thimble 14.

During the process of vulcanization the flat faces 11 are forced together, and by reason of such vulcanikation/become in effect merged, the finished product displaying no joint.

Owing to the shape of the parts and the pressure exerted thereon, a fin 17, Fig. 13, will be formed around the inner portion or margin of the bag, and a bead or rib 18 will be produced upon the outer edge. Thus the bag is strengthened where subject to the greatest strain.

Special attention is called to the fact that the plane d1-l7 of each surface 11 is inclined to the plane of the final joint, and this surface is highcr on its inner edge than on its outer edge. One or both of the two meeting surfaces may be thus inclined and the effect is not only to form the strengthening inner rib 18, but also to increase the firmness of union between these two surfaces over what it would be if the surfaces were parallel.

curing twohalves or sections provided with joint-forming surfaces relatively so inclined that the inner edges of sald surfaces meet first; pressing the two halves together; and

finally curing the same while thus pressed together. i

2. The process of making hollow rubber articles, which consists in molding. two halves or sections and producing joint-forming surfaces thereon, at least one of which is higher at its inner than at its outer edge and is also broader than the thickness of the adjacent portion of the rubber wall; semicuring said halves; ressing them together; and finally curing tliem while thus pressed together.

3. The process of manufacturing rubber bags, which consists in forming upon each of the sectionsof partially-cured 1 rubber from which the bag is produced, a marginal ins-4,196

the body stock; removing the excess material and thereby forming a broad, jointforn'limg surface; and finally bringing such surfaces of the sections together and vulcanizing the same.

4. The process of manufacturing rubber bags, which consists in producing bag sections of partially cured rubber and having homogeneous edges; placing said sections to gether edge to edge; positioning a screwthreaded valvesocket in the neck portion formed by the sections; and finally vulcanizing the bagthus built up, with the valve socket in place therein.

The process of manufacturing rubber bags, which consists in producing bag-seclions of partially cured rubber, each section having a fin extending therefrom; cutting the fin from the section at an angle to the plane of the final joint and thereby producing a joint forming surface having a raised inner edge; superimposing the sections thus formed; and finally vulcanizing the same.

(5. The process of manufacturing rubber bags which consists in producing bag-seetions of partlally cured rubber, each section comprising a half-bag having a curved thickened portion extendin around the same and a tin projecting thererroin; cutting the fin from the section through the thickened portion and thereby producing a relatively Wide and fiat face; superposing the half-bags thus formed, with the flat faces contacting; and linally vulcanizing the same.

T. The process of manufacturing rubber bags, which consists in producing bag-sections of partially cured rubber, each section comprising a halfbag having a curved thickened portion extending around the same and a fin projecting therefrom; cutting the fin from the section through the thickened portion and thereby producing a relatively wide and tlat face; superposing the halfbags thus formed, with the flat faces contacting; placing a threaded valvesockct within the neck of the bag; and finally vulcanizing the bag-sections. E x I In testimony whereof I 'haire signed my name to this specification in the presence of two subscribing witnesses. IRWIN F. KEPLER.

Witnesses l varrriui K. MEANS, Runner W. Arrnnn, 

